Re: Problems with packages compiled with gcc 10.0

[Guido Aulisi]

Il giorno mar, 19/05/2020 alle 12.11 +0200, Florian Weimer ha scritto:
>  * Guido Aulisi:
>  
>  > I'm getting some strange errors from some packages built for f32
>  > with
>  > gcc 10.0 [0].
>  > Building with g++ 10.1 ardourd5 seems fine...
>  > 
>  > It seems GCC 10.0 had some bugs that could be discovered only at
>  > runtime. Did you have any similar problems?
>  > 
>  > Ciao
>  > Guido
>  > FAS: tartina
>  > 
>  > [0]: https://bugzilla.redhat.com/show_bug.cgi?id=1837089
>  
>  Comment 12 on that bug suggests that it's the known underlinking
>  issue
>  in Ardour (“it seems related to a missing symbol (__atan2_finite) in
>  libvampplugins”).  If true, this is not related to GCC 10 at all. 
Yes, that really seems a link and/or symbol versioning problem, but it
wasn't the only one.
I had some other crashes in packages, usually not x86 arches.
As an example sord [0] was crashing on power64 when compiled with -O2,
an exit condition in a for loop was optimized out until it crashed the
loop. I had to use -O1 [1], and I have not tried with gcc 10.1 yet.

>  Thanks,
>  Florian 
Ciao
Guido

[0]: https://src.fedoraproject.org/rpms/sord/
[1]:
https://src.fedoraproject.org/rpms/sord/c/0a9adfc498d2e3cfcb3c8e67e53463b...